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Windows Operating Systems: The Photos You Need to See

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Gallery: 9/27

Bill Gates talks to the press about Windows XP at a news conference in 2001. Fun fact: Windows XP was code-named "Whistler," which makes "Threshold" seem like a pretty cool code name by comparison. (Getty)

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With an update for Windows 8.1 out later this month (and Windows "Threshold" right around the corner), we've put together a visual history of Windows.